update 2 difficulty endpoint and 2 original endpoint

app.py

@@ -125,7 +125,7 @@ async def upload_multiple_files(
 @app.post("/generate_saved", response_model=GenerateResponse)
 async def generate_saved_endpoint(
     n_easy_questions: int = Form(3),
-    n_medium_questions: int = Form(5), 
+    n_medium_questions: int = Form(5),
     n_hard_questions: int = Form(2),
     qdrant_filename: str = Form("default_filename"),
     collection_name: str = Form("programming"),
@@ -139,13 +139,13 @@ async def generate_saved_endpoint(
     global rag
     if rag is None:
         raise HTTPException(status_code=503, detail="RAGMCQ not ready on server.")
-    
+
     difficulty_counts = {
         "easy": n_easy_questions,
         "medium": n_medium_questions,
         "hard": n_hard_questions
     }
-    
+
     all_mcqs = {}
     counter = 1
 
@@ -205,7 +205,7 @@ async def generate_endpoint(
     background_tasks: BackgroundTasks,
     file: UploadFile = File(...),
     n_easy_questions: int = Form(3),
-    n_medium_questions: int = Form(5), 
+    n_medium_questions: int = Form(5),
     n_hard_questions: int = Form(2),
     qdrant_filename: str = Form("default_filename"),
     collection_name: str = Form("programming"),
@@ -247,7 +247,7 @@ async def generate_endpoint(
         "medium": n_medium_questions,
         "hard": n_hard_questions
     }
-    
+
     all_mcqs = {}
     counter = 1
 

generator.py

@@ -604,7 +604,7 @@ class RAGMCQ:
             }
 
         return report
-    
+
     def connect_qdrant(self, url: str, api_key: str = None, prefer_grpc: bool = False):
         if not _HAS_QDRANT:
             raise RuntimeError("qdrant-client is not installed. Install with `pip install qdrant-client`.")
@@ -896,7 +896,7 @@ class RAGMCQ:
 
                 if "error" in list(mcq_block.keys()):
                     return output
-                
+
                 for item in sorted(mcq_block.keys(), key=lambda x: int(x)):
                     qcount += 1
                     output[str(qcount)] = mcq_block[item]
@@ -996,7 +996,7 @@ class RAGMCQ:
                 res = self._retrieve(stmt, top_k=1)
             except Exception:
                 res = []
-                
+
             if res:
                 raw_score = float(res[0][1])
                 emb_support = safe_map_sim(raw_score)
@@ -1194,9 +1194,9 @@ class RAGMCQWithDifficulty(RAGMCQ):
                         correct_text = options[correct_key.strip()]
                     else:
                         correct_text = payload.get("correct_text") or correct_key or ""
-                        
+
                     diff_score, diff_label, components = self._estimate_difficulty_for_generation( # type: ignore
-                        q_text=q_text, options={k: str(v) for k,v in options.items()}, correct_text=str(correct_text), context_text=structured_context, concepts_used=concepts 
+                        q_text=q_text, options={k: str(v) for k,v in options.items()}, correct_text=str(correct_text), context_text=structured_context, concepts_used=concepts
                     )
 
                     payload["độ khó"] = {"điểm": diff_score, "mức độ": diff_label}
@@ -1342,7 +1342,7 @@ class RAGMCQWithDifficulty(RAGMCQ):
 
                     #? change estimate
                     diff_score, diff_label, components = self._estimate_difficulty_for_generation( # type: ignore
-                        q_text=q_text, options={k: str(v) for k,v in options.items()}, correct_text=str(correct_text), context_text=structured_context, concepts_used=concepts 
+                        q_text=q_text, options={k: str(v) for k,v in options.items()}, correct_text=str(correct_text), context_text=structured_context, concepts_used=concepts
                     )
 
                     payload["độ khó"] = {"điểm": diff_score, "mức độ": diff_label}
@@ -1382,7 +1382,7 @@ class RAGMCQWithDifficulty(RAGMCQ):
                 return 0.0
             mapped = (s + 1.0) / 2.0
             return max(0.0, min(1.0, mapped))
-        
+
         # embedding support
         emb_support = 0.0
         try: